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| author |  Thomas Guyot-Sionnest <dermoth@users.sourceforge.net>
| 2008-09-02 03:42:16 +0000 |
|---|---|---|
| committer | Thomas Guyot-Sionnest <dermoth@users.sourceforge.net>
| 2008-09-02 03:42:16 +0000 |
| commit | a24c8f001fade8b136cb03781951d474b5e4456d (patch) | |
| tree | 78be19ea3784e20ad2c0a64823618fd3946da558 /plugins/check_ntp_peer.c | |
| parent | 122610e3730b8dd4afb41dfa48e65ba75f5586fe (diff) | |
| download | monitoring-plugins-a24c8f001fade8b136cb03781951d474b5e4456d.tar.gz | |
Fix possible segfault in check_ntp_peer with deliberately invalid packets
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@2052 f882894a-f735-0410-b71e-b25c423dba1c
Diffstat (limited to 'plugins/check_ntp_peer.c')
| -rw-r--r-- | plugins/check_ntp_peer.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/plugins/check_ntp_peer.c b/plugins/check_ntp_peer.c index 72cec639..6a4401ca 100644 --- a/plugins/check_ntp_peer.c +++ b/plugins/check_ntp_peer.c @@ -299,6 +299,9 @@ int ntp_request(const char *host, double *offset, int *offset_result, double *ji if(read(conn, &req, SIZEOF_NTPCM(req)) == -1) die(STATE_CRITICAL, "NTP CRITICAL: No response from NTP server\n"); DBG(print_ntp_control_message(&req)); + /* discard obviously invalid packets */ + if (ntohs(req.count) > MAX_CM_SIZE) + die(STATE_CRITICAL, "NTP CRITICAL: Invalid paclet received from NTP server\n"); if (LI(req.flags) == LI_ALARM) li_alarm = 1; /* Each peer identifier is 4 bytes in the data section, which * we represent as a ntp_assoc_status_pair datatype. |